Vacuum-pump.



APPLIUAMON FILED JAN. 22. 19.1.0.

umm

To may; @mi

Be nomi lwfonii i. citizen o li'iiid y' mim/ille, ma @om in iiili- Y iencefi, unile? som@ conditions, owing "io une i'zic; nlm-d; slime mi@ such splashing 0i lli, Winer :is "would fiend lo wutei' Saal the inletand thus prevenfg lim in'low oi an iii-0m the cnnclengei loionggli ila@ zur inlet pori?, i9, smh speeiis boul Lne-limo wlmi l\^ l lim f lli@ waitin inlel. ll.. i l mw posrallill lo www man ally; muto siimnalilc ll (fi. 1

the www miga oi' the nii' l l lili@ @l waer inlet :ind zwoio eects of splashing'.

The accompanying drawing@illusli'nl@ my invanticn.

Figure l is :l transverse svcl'ion nl n pump Consiiiuctml in accordance with my invann Wili lli@ i ing of lli@ commonllumvlwlx@ typi. ',iln barrel iS conxplv'ml liy lli@ usual mul will# l5 belween which ilni impallmrs livD anni lomlingg upwardly ino {in} .lo-wmf vnd oi ilu, lim'- l'el is the wz, ,er lil/t .V27 'fixe usual alor out lot l?, lvndiing :wann llo@ umm' sill@ o1" the lmi'l.

Formed tlnouggl'x. muli and will lli (the double conlruifion :is here ilesci'il @il nl- Serin Eli-(fl. 539,592.

port 16 'wl ich lios between lli@ @No impellers and libs is upper edge as naaf as possible *mi 'lie lows? 'ine of Contact between the im- -lf "l lap provided as a The, port 1G need not be liczil dim@ sions so long as pziciy is inuiniained, it befnii'e its lower edge as high i nnsversely thi:- por 1G is possible into ille cylin i ie bniiel so that die ips :"iend to points Where comtlieeo will e municzition between lle pori, 16 und the poel/iet 1 7 (fofmed, betw two adjacent lobes 'of :in impelle) and the cylindrical portion of the barrel will noi be cui oil until about. the ine when the *Lip of the incoming lobe of thv impellei con'ncs Willi lie adjacent cylinili'icail pnvrinn of lie barrel, at 18. By tlins aiinnging; `,e poll@ full npporlnnty given n cunlinuous iniow air into alie glimp chamber above any Vpossible level lo which miei niziy isez in tlielower :en v of like pump ani. inem will be inflow of possible.

' Tha@ isj ai all tiinasi zi endency for water within the lowm port of 'flxe pump l0 flow mil, 'fau-illy desirable that no poilion of ilse mariage conllm'vc' purl, oi' the pori :and in ille forni shown in Fig. llieieiol'o prox/rifle a vertical pas- 19 which communicai'es at its upper und willi n coupling lo which a sulnble sup ply pipe may be. Connected, said supply pipe (not Slmwn), coming from an exhaust chainlim" o1' condensing clinmoeiin un oucimu'y manner. ln Fi 3 lli@ nii' pori l is fed by :x lmrizouze 3i-mm3@ il() which is proi'iilml nl i miv? will willi n portion adapted to receive n fawl pipe.

l claim is my invenlion;

l'. l1: n vnoamn pump lli@ lolied-ixn pvllm ljiiw. :i volvi' inlet, nn :air port leading into lw pump clminlwx' liet-uwen the i1npullman' llioi'eof :nul mlcnilmgg transversely u into those portionrs of the pump chamber with which li lobes of 'die iinpllelsconm-y wlioxlw llw ali p will bo cut ol' by lli@ l'oluw ha iniiellers at about lli@ lime said l s cnt ofi' communication wih the Wale? inist.

2, .in a, ifncumn pump of the l puller tyie, n wai-@1' inlelc 1in air mi ing into the pump chamber between the impel 1ers thereof and extending transversely into those portions of the pump chamber with which the lobes of the impellers oontact whereby the said air port will be eut off by the. lobes of the impellers at about the time said lobes out olf communication with the Water inlet, said air port having its upper edge slightly below the lowest line of Contact. between the two impellere and its lower edge above the lowestpoints of the pump chamber which co-aet with the iin pellere.

3. lin a vacuum pump7 a pump chamber comprising i1 pair of mating portions and connecting end Walle, lobeil ehninbei'mid (1o-acting tions und endwrilis thereof, said pump chamber having tewater inlet'leading into j the lower part thereof between the uniting i portione chamber so ne, to be out oil" vfrom said chum-- hei' by the lobesl ol.' the in'ipellers at about the time when said iobes out off Suid niatinfr r: portion@y from the water inlet, seid. reeees having :in :iii eed piiseiige lending thereto. i

a pair of eo-acting[ inipelleie mounted in said pump with the meting por- 1 sind an end Wall having' a trans-- vereely exni'iiled reeese formed therein anni i extending into the mating portions ofthe I i i i i V i i i l i of the chamber so by the. 1

said lobes eut o saiii. mating portions from the Water inlet, seid recess having an air feed passage lending thereto,

ln e vacuum pump of Ythe lobedim peller type, en air port. lending-into the pump chamber between the impeliers thereof :ind extending transversely intotlioso portions of the pump chamber with which the lobes of the iinpeliernl Contact whereby the said air port will be out olf by the lobes ot the impellers iit'about the tilini said lobes eut ol' eomu'iunieution with the i'iitei port. :unl :i ieitienl iiii piif":i1e formed in the fmt mining' nml conunui. outing with ihe :iii inlet. unil having;` ite inlet above the nii' port.

ln witnese whei'ifo, l have hereunto my luiml :imi sem' :it fmlisinzrpolis` lmlisliui.

thih` third (izi'v et' Jummry, l). om thouA Sami nin: huinlii'erl nml nine.

JHN T. ii'yiiilh'. inni yitnesr S:

Airi'iiiri: l t Timmie' 35. fait 

